Tejas Networks – Product based IT business in a favored sector?

{Have been invested for a while – been through thick and thin on Tejas NW}

Sometimes I question, why is/was BSNL so reluctant to use TCS-TejNW consortium for implementing this home grown stack? What is that they fear? Is this in any way inferior to say Jio or Airtel setup?

If anyone has technical highlights to throw light upon, kindly do.

Now it seems execution is the key. The management has been zealous in projecting growth, but for some reason or another failed to step up to the plate. [Do understand, they are the ones doing the hardwork and it is easy as a commentator to just muse]. But am hoping for a difference.